What is the best argument Jill could make to persuade a judge regarding the curtains?

Jill's strongest argument revolves around the idea that the curtains were custom-made for an odd-shaped window. This detail adds significant value to her claim because it implies that the curtains are specifically tailored to fit that particular space in the house. Custom items often carry both functional and emotional value, as they are not easily replaceable. This uniqueness could lead a judge to see the curtains as integral to the property's character.

In contrast, while the other options present potential points of contention regarding the inclusion of the curtains, they do not carry the same weight. A mention about the curtains being included with the house may be vague and lack any formal agreement. An agent's assurance might not hold legal validity if it lacks documentation. Finally, advertising the curtains in a paper is less persuasive, as ads can often be misleading and do not guarantee specific inclusions in a sale. Therefore, the argument about the custom nature of the curtains most compellingly establishes their importance to the property.